/*
 * Copyright (C) 2007-2010 Geometer Plus <contact@geometerplus.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA.
 */

package org.geometerplus.zlibrary.text.view.style;

import org.geometerplus.zlibrary.text.view.ZLTextHyperlink;
import org.geometerplus.zlibrary.text.view.ZLTextStyle;

public abstract class ZLTextDecoratedStyle extends ZLTextStyle {
    // fields to be cached
    private String myFontFamily;
    private int myFontSize;
    private boolean myIsItalic;
    private boolean myIsBold;
    private boolean myIsUnderline;
    private int myVerticalShift;

    private boolean myIsNotCached = true;

    protected ZLTextDecoratedStyle(ZLTextStyle base, ZLTextHyperlink hyperlink) {
        super(base, (hyperlink != null) ? hyperlink : base.Hyperlink);
    }

    private void initCache() {
        myFontFamily = getFontFamilyInternal();
        myFontSize = getFontSizeInternal();
        myIsItalic = isItalicInternal();
        myIsBold = isBoldInternal();
        myIsUnderline = isUnderlineInternal();
        myVerticalShift = getVerticalShiftInternal();

        myIsNotCached = false;
    }

    @Override
    public final String getFontFamily() {
        if (myIsNotCached) {
            initCache();
        }
        return myFontFamily;
    }

    protected abstract String getFontFamilyInternal();

    @Override
    public final int getFontSize() {
        if (myIsNotCached) {
            initCache();
        }
        return myFontSize;
    }

    protected abstract int getFontSizeInternal();

    @Override
    public final boolean isItalic() {
        if (myIsNotCached) {
            initCache();
        }
        return myIsItalic;
    }

    protected abstract boolean isItalicInternal();

    @Override
    public final boolean isBold() {
        if (myIsNotCached) {
            initCache();
        }
        return myIsBold;
    }

    protected abstract boolean isBoldInternal();

    @Override
    public final boolean isUnderline() {
        if (myIsNotCached) {
            initCache();
        }
        return myIsUnderline;
    }

    protected abstract boolean isUnderlineInternal();

    @Override
    public final int getVerticalShift() {
        if (myIsNotCached) {
            initCache();
        }
        return myVerticalShift;
    }

    protected abstract int getVerticalShiftInternal();
}
